This is a topic that should be explained in the instructions that come with the Separett. But for some reason it is not explained, and I get calls about this all the time. This tells you all you need to know about Separett vent pipe and how to vent your Separett toilet.

Separett vent pipe

Separett vent pipe couplings – included in the box

Separett vent cap for Separett vent pipe

The pipe that comes with the Separett is 16″ of metric white PVC. It is not a standard North American size. There are transition couplings in the box which allow you to use standard 3″ schedule 40 PVC, which can be purchased anywhere. You transition once at the toilet, then you transition again at the end of the vent pipe, so you can use the supplied metric vent cap.

Note: in some areas you may be able to buy 3″ thin walled drain pipe. This is also suitable, and there are transition couplings in the box for that pipe as well. The advantage is it is cheaper and lighter. But it can be hard to find. Lowes was carrying it online, last time I checked, as was Menards.

Cleaning Separett vent pipe

The pipe that comes with the Separett is very glossy furniture grade PVC. You can’t buy 3″ furniture grade pipe in North America. However, you can clean all the writing and marks off of out 3″ pipe by rubbing with acetone. It works great!

Also, you must use 3″ pipe as Separett vent pipe. You should not use 2″. Not enough air will flow through the 2″ pipe. Keep in mind that air does not like to travel. Keep your Separett vent pipe as short and straight as possible. If you have no more than 2 90 degree bends, and a total vent pipe length of 15′, you can use the Separett 9210 DC/AC. Otherwise you’ll need the 9210 DC.

Please call me toll free if you are interested in purchasing a composting toilet and have questions - 1 888 361 0014. I answer my own phone. You won't hear "we are experiencing higher than normal call volumes...". You won't have to listen to a long menu telling you about options you don't need. If I'm not available, I will personally return your call asap.